Arrangement for the compensation of raman scattering

Details Arrangement for the compensation of raman scattering Arrangement for the compensation of raman scattering

H - Electricity

04

B

H04B 10/18 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2550129

A light beam (LS), which is used to transfer a wavelength multiplex signal (WDMv), is guided to a Bragg grating (BG) by means of an adjustable mirror (MR1). According to the angle of incidence of the light beam on the longitudinal axis (LA) of the Bragg grating (BG), various transmission characteristic lines having different gradients (m0 - m4) are obtained. As a result, scattering of the wavelength multiplex signal (WDMv) can be compensated. A second controllable mirror (MR2) enables the damping to be adjusted. A control device (RE) causes the scattering to be corrected in a rapid manner after the data signals are connected/or disconnected.

Selon l'invention, un rayon lumineux (LS) servant à la transmission d'un signal multiplexé en longueur d'onde (WDM¿v?), est guidé sur un réseau de Bragg (BG) par l'intermédiaire d'un miroir réglable (MR1). Selon l'angle d'incidence du rayon lumineux par rapport à l'axe longitudinal (LA) du réseau de Bragg (BG), on obtient diverses caractéristiques de transmission présentant diverses pentes (m¿0 ?-¿ ?m¿4?). De cette manière, il est possible de compenser un défaut d'alignement angulaire du signal multiplexé en longueur d'onde (WDM¿v?). Un deuxième miroir commandable (MR2) permet de régler l'amortissement. Un dispositif de régulation (RE) provoque une correction rapide du défaut d'alignement angulaire après la mise en circuit/hors circuit de signaux de données.

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